摘要： 在构建容灾系统时，大量数据迁移会导致本地端业务的长时间停滞。此外，传统容灾系统以推送方式进行数据传输，易形成本地端内存数据的积压。针对上述问题，利用动态镜像加载技术和使用吸拉式日志的异步数据传输方法，设计一种基于存储虚拟化的动态容灾系统。实验结果证明，该系统能在不改变本地端存储架构的前提下对本地端进行容灾保护，可较好地保证数据一致性，仅对被保护系统产生低于20%的性能影响。

关键词: 动态容灾, 吸拉式日志, 存储虚拟化, 异步数据传输, 数据积压, 数据一致性

Abstract: When building a disaster tolerance system, the migration of large mounts of data will cause long time stagnation of local business. In addition, traditional disaster tolerance systems transmit data in the way of pushing, which results in an excess of local memory data accumulation. Aiming at solving these two problems, this paper designs and implements a dynamic disaster tolerance system based on storage virtualization. The system adopts techniques of dynamic image loading and asynchronous data transmission based on pulled-log. Test results show that, the system can render disaster tolerance service for the local without changing the local storage architecture, ensure data consistency and produce less than 20% of the performance penalty.

Key words: dynamic disaster tolerance, pulled-log, storage virtualization, asynchronous data transmission, data accumulation, data consistency

中图分类号: 

• TP391